NSThread sleepfortimeinterval阻止主线程

Question

我想模拟与服务器的通信.由于远程服务器会有一些延迟,我想使用它上面的后台线程

 [NSThread sleepForTimeInterval:timeoutTillAnswer];

该线程是使用NSThread子类创建的并且已经启动...但是我注意到sleepForTimeInterval阻塞了主线程...为什么??? 默认情况下,NSThread不是backgroundThread吗？

这是线程的创建方式:

   self.botThread = [[PSBotThread alloc] init];
    [self.botThread start];

更多信息:这是bot线程子类

- (void)main
{
    @autoreleasepool {
        self.gManager = [[PSGameManager alloc] init];
        self.comManager = [[PSComManager alloc] init];
        self.bot = [[PSBotPlayer alloc] initWithName:@"Botus" andXP:[NSNumber numberWithInteger:1500]];
        self.gManager.localPlayer = self.bot;
        self.gManager.comDelegate = self.comManager;
        self.gManager.tillTheEndGame = NO;
        self.gManager.localDelegate = self.bot;
        self.comManager.gameManDelegate = self.gManager;
        self.comManager.isBackgroundThread = YES;
        self.comManager.logginEnabled = NO;
        self.gManager.logginEnabled = NO;
        self.bot.gameDelegate = self.gManager;
        BOOL isAlive = YES;
        // set up a run loop
        NSRunLoop *runloop = [NSRunLoop currentRunLoop];
        [runloop addPort:[NSMachPort port] forMode:NSDefaultRunLoopMode];
        [self.gManager beginGameSP];
        while (isAlive) { // 'isAlive' is a variable that is used to control the thread existence...
            [runloop runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
        }



    }
}

- (void)messageForBot:(NSData *)msg
{
    [self.comManager didReceiveMessage:msg];
}

我想从主线程中调用"messageForBot"...后台线程也应该调用主线程上的方法进行通信..睡眠时间在gManager对象内部进行干扰....

Answer 1

它阻止运行sleepForTimeInterval的任何线程.在另一个线程上运行它来模拟您的服务器延迟,如下所示:

dispatch_queue_t serverDelaySimulationThread = dispatch_queue_create("com.xxx.serverDelay", nil);
dispatch_async(serverDelaySimulationThread, ^{
     [NSThread sleepForTimeInterval:10.0];
     dispatch_async(dispatch_get_main_queue(), ^{
            //Your server communication code here
    }); 
});